LTC7151S datasheet(7/38 Pages) AD

7 / 38 page

LT7182S

Rev. 0

For more information www.analog.com

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT7182SR is specified over the –40°C to 150°C operating

junction temperature range. High Junction temperatures degrade operating

lifetimes; operating lifetime is derated for junction temperatures greater

than 125°C. Note the maximum ambient temperature consistent with

these specifications is determined by specific operating conditions in

conjunction with board layout, the rated package thermal impedance and

other environmental factors.

Note 3: The LT7182S includes overtemperature protection that is

intended to protect the device during momentary overload conditions.

The maximum rated junction temperature will be exceeded when this

protection is active. Continuous operation above the specified maximum

operating junction temperature will reduce lifetime.

Note 4: EEPROM endurance is guaranteed by design, characterization and

correlation with statistical process controls. Data retention is production

tested via a high temperature bake at wafer level. The minimum retention

specification applies for devices whose EEPROM has been cycled less than

the minimum endurance specification.

Note 5: When internal compensation is selected (by connecting ITH

to INTVCC), eight internal resistor values are available in non-linear

increments. See the MFR_PWM_MODE_LT7182S command in the

LT7182S PMBus/I2C Reference Manual.

Note 6: The LT7182S switching regulators use valley current mode control

so the current limits specified correspond to the valley of the inductor

current waveform. Maximum load current is higher and equals the valley

current limit plus one half of the inductor ripple current. See Applications

Information for more details.

ELECTRICAL CHARACTERISTICS

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

I2C/PMBus Timing

fSCL

Serial Bus Operating Frequency

1000

kHz

tBUF

Bus Free Time Between Stop and Start

500

tHD:STA

Hold Time After repeated Start Condition

260

tSU:STA

Repeated Start Condition Setup Time

260

tSU:STO

Stop Condition Setup Time

260

tSU:DAT

Data Input Setup Time

tHD:DAT

Data Input Hold Time

Data Output Hold Time

450

tTIMEOUT

Bus Timeout

tLOW

Serial Clock Low Period

0.5

10000

µs

tHIGH

Serial Clock High Period

260

The l denotes the specifications which apply over the full operating

temperature range, otherwise specifications are at TA = 25°C.

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